Improvement in treadle attachments for sewing-machines



UNITED STATES PATENT OEEICE.

WARREN GLOVER, AOF NEW ENGLAND VILLAGE, MASSACHUSETTS.

IMPROVEMENT IN TREADLE ATTACHMENTS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 31,236, dated January 29, 1861.

To all whom it may concer-n Be it known that I, WARREN GLOVER, of New England Village, in the county of Worcester and State of Massachusetts, have invented a new and Improved Treadle Attachment for Sewing-Machines, Turning-Lathes, and other Machines which are operated by Treadles; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being hadto the annexed drawings, making a part of this speciiication, in which- Figure l is a side sectional view ot` my invention, takenin the linexx, Fig. 2; Fig. 2, a front view of the same; Fig. 3, a transverse section of the shaft, taken in the line yy, Fig. 2.

Similar letters of reference indicate corresponding parts in the several figures.

rIhe object of this invention is to communicate fnotion from a treadle to the -drivingshaft of a machine in such a manner that the shaft cannot casually be turned in the wrong direction, and the shaft at the same time rendered capable of being turned immediately under the tread of the foot in any position of the treadle, thereby obviating the difliculty attending the use of the ordinary crank, which cannot beturned from the treadle in the proper direction at once from all points in the path of its rotation.

The invention also has for its object the obviating of the concussion attending the movement ol" reciprocating parts-such as frames, rods, &c.-which have hitherto formed an essential element in devices for con vertinga vibra ting or a reciprocating motion into a rotary one, and vice versa.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the driving-shaft of a machine, on which two collars, B B', are placed loosely and allowed to rotate freely. Each collar B B' at its inner end has a circular disk or ange, C, attached or formed on it. The faces of the disks or anges arein parallel planes,a nd between the disks or flanges C G there is a hub or pulley, D, which is permanently secured to the shaft A.

On the shaft A there are placed loosely two arms, E E,an arm being in each space between a disk G and the hub D. At the ends of the arms E there are placed eccentrics F, one 0n each end of each arm. These eccentrics are each of a double form-that is to-say, they are formed oftwoprominences, om, as shown clearly in Fig. 2, and the two eccentrics of each arm are placed in reverse positions, and those of one arm have also a position reverse to those of the other. (See Figs. 2 and 3.) The eccentrics F of eachv arm have spiral springs?) attached to them, and these springs have a tendency to keep the prominences a a of the eccentrics F against or incontact with the faces of the disks C and the sides of the hub D.

G is a treadle, which is fitted and works on centers c c,and H H H' H' are straps, which are attached to the treadle at its ends, two at each side, and to the collars B B'. The straps H H are attached to the collar B, and they wind around it in opposite directions. 'lhe straps H H are attached to the collar B', and also wind around it in opposite directions. "Ihe straps H H, however, are attached to their collar Bin a manner reverse to that of the straps H' H to their collar B. By this arrangement it will be seen that as the treadle G is vibrated the collars B B' will be turned in reverse directions, and each rotated first in one direction and then in the other. The eccentrics F are acted upon by the disks C, and bind between said disks and the sides of the hub D, and thereby cause the shaft A to rotate. The eccentrics F, however, will not bind between said disks C and the hub D, except when the disks C are rotating1 in the direction indicated by the arrows, such result being due to the position of the eccentrics F on the arms E. The disks C therefore alternately rotate the shaft A,and com municate to it a continuous rotary motion as the treadle G is vibrated.

It will be seen that the shaft A may be turned in the proper direction at once as the treadle is vibrated. In fact, it cannot be turned in the wrong direction, and the device will therefore prove valuable for sewing-machines, as the turning of the driving-shaft of these machines in the wrong direction is attended with the breaking of needles and a derangement of the working parts.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The arrangement of the disks C C, collars B B', arms E E, eccentrics F F, straps H H', and treadle G with the shaft A and hub D, as herein shown and described.

Witnesses: WARREN GLOVEB.

H. J. HAERINGTON, J. W. BARRINGTON. 

